Table 4. Three-way ANOVA results for XTT.

Variable	Source	SS	df	MS	F	p-value
XTT	Printer	0.087	1	0.087	0.93	0.337
	Angle	0.554	2	0.277	2.958	0.057
	Period	0.753	1	0.753	8.035	0.006 *
	Printer x Angle	0.177	2	0.089	0.946	0.392
	Printer x Period	0.005	1	0.005	0.058	0.81
	Angle x Period	0.006	2	0.003	0.031	0.97
	Printer x Angle x Period	0.483	2	0.241	2.576	0.081
	Error	8.991	96	0.094
	Total	11.056	107

* Statistically significant, p<0.05.